Abstract
The value of laser Doppler flowmetry in measuring blood flow through the lung was assessed comparing it with flow measured by electromagnetic flowmetry. This was an experimental laboratory-based prospective study performed in an approved University animal research facility. Ten beagle dogs were used. Simultaneous measurement of pulmonary blood flow by laser Doppler flowmetry and electromagnetic flowmetry was carried out at varying degrees of pulmonary artery constriction. There was a linear relationship between the two methods of assessing blood flow (regression equation: y = 0.9x + 5.5; p = .00001) using a least-squares, best fit, straight line analysis (160 data points). The results of this study demonstrate that laser Doppler flowmetry provides an accurate indicator of pulmonary blood flow, which in practice is both simple and reproducible.
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